Running out of memory on the hard disk.
Screen resolution seems to confuse people as well.
If somebody says "Make it larger", I increase the resolution of the screen. The is opposite to what some people expect. They expect the icons to get larger.
Now that's IT pedantry, as you you perfectly well what they mean.
I do now I've been exposed to it.
The first time it happened I was boggled. I really didn't understand.
I was demonstrating an application to my boss.
"Make your screen larger" said my boss.
I supposed he wanted to check that the GUI parts worked correctly with a larger screen.
I increased the resolution from 1024 up to 1280, then maximized the application to show that it still worked.
"No, larger" he said.
I was amazed he would still be able to read the font, but increased the resolution to 1400 (something mumble).
"Stop making it smaller" he said.
"It's not smaller" said I, "Look how much more I can fit on it!"
"No, make it so the icons are bigger" he said.
I reduced the screen to 800x600, and he was satisfied.
Now if people ask me to "Make it bigger" I ask them what they mean. Most of the time they want things to appear larger on the screen, not make the desktop contain more space.